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EC number: 237-509-4 | CAS number: 13821-20-0
Particle size distribution (Granulometry)
Administrative data
Link to relevant study record(s)
- Endpoint:
- particle size distribution (granulometry)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- From 23 October 2013 (date of the measurements) to 3 December 2013 (date of the study report)
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Laser diffraction particle size analysis was applied on a dispersion of the powder in isopropanol. Six measurements were performed according to GRAN-99001 (internal method).
- GLP compliance:
- no
- Other quality assurance:
- other: The activity of R&I Centre Brussels is certified according to the ISO 9001:2000 standard.
- Type of method:
- Laser scattering/diffraction
- Type of particle tested:
- primary particle
- Type of distribution:
- volumetric distribution
- Mass median aerodynamic diameter:
- 23.81 µm
- Geometric standard deviation:
- 0.14
- Key result
- Percentile:
- D10
- Mean:
- 4.017 µm
- St. dev.:
- 0.016
- Key result
- Percentile:
- D50
- Mean:
- 14.66 µm
- St. dev.:
- 0.09
- Key result
- Percentile:
- D90
- Mean:
- 37.7 µm
- St. dev.:
- 0.4
- Conclusions:
- The mean D50 of Lithium cryolite was found to be 14.66 µm.
- Executive summary:
Laser diffraction particle size analysis was applied on a dispersion of the powder in isopropanol. Six measurements were performed. The particle size distribution is summarised as follows:
Mean diameter
(μm)
D50
(μm)
D10
(μm)
D90
(μm)
MMAD
(μm)
Mean value
18.85
14.66
4.017
37.7
23.81
Standard deviation
0.17
0.09
0.016
0.4
0.14
Reference
The table below summarizes the individual results, the mean value and the standard deviation for the mean diameter, D50 (median), the D10 and D90 percentiles and the MMAD estimated by assuming that the particles are spherical.
|
Mean diameter (μm) |
D50 (μm) |
D10 (μm) |
D90 (μm) |
MMAD (μm) |
Trial 1 |
19.06 |
14.77 |
4.037 |
38.20 |
23.98 |
Trial 2 |
18.91 |
14.68 |
4.019 |
37.88 |
23.84 |
Trial 3 |
18.75 |
14.55 |
3.995 |
37.55 |
23.63 |
Trial 4 |
19.01 |
14.75 |
4.032 |
38.02 |
23.95 |
Trial 5 |
18.70 |
14.63 |
4.010 |
37.47 |
23.76 |
Trial 6 |
18.65 |
14.58 |
4.009 |
37.27 |
23.68 |
Mean value |
18.85 |
14.66 |
4.017 |
37.7 |
23.81 |
Standard deviation |
0.17 |
0.09 |
0.016 |
0.4 |
0.14 |
Description of key information
D50 (median): 14.66 µm
D10 : 4.017 µm
D90 : 37.7 µm
Additional information
One reliable key study is available for this endpoint.
Laser diffraction particle size analysis was applied on a dispersion of the powder in isopropanol. Six measurements were performed. The particle size distribution is summarised as follows:
|
Mean diameter (μm) |
D50 (μm) |
D10 (μm) |
D90 (μm) |
MMAD (μm) |
Mean value |
18.85 |
14.66 |
4.017 |
37.7 |
23.81 |
Standard deviation |
0.17 |
0.09 |
0.016 |
0.4 |
0.14 |
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